Explosion-engine.



.TONAS'JTULAGERGREX, OF-NEW YORK, N. Y;

EXPLOSION-ENGINE.

Specification of Letters Patent. I

Patented uly 2, 1907.

Application filed April29, 1905. Serial No- 257.984.

To all whom it may concern.-

v Be it known that I, J QNAST. LAGERGREN, a subject of the King of Sweden and residing at New York, in the county of New York and State of New York; have invented certain, new and useful Improvements in Explosion-Engines, of which the following, is a specification; such as will enable those skilled in'the art to which it appertains to make and use the sam This invention relates to what are known as explosion ,engines, and the object of the inventionlis to provide an improved engine of this class in'whi'ch liquid fuel and air are used and in which the explosion takes placein an independent chamber separated from the main piston chamber and adapted to be placed in communication therewith at the momentthe explosion is effected, this communication being controlled by'a valve construction whenebythe gases at the moment of explosion are led to the main cylinder to expand either in one or two stages;a further objectbeing to provide an engine of the class specified with an explosion chamber intowhich air'under'press'ure is passed, and into. which liquid fuel under pressure is passed at the moment the ex:

plosion is desired, at which moment the communication between the main cylinder and the explosion chamber is stablishedgand with these'and' other objects in view the invention consists in the improvement in an explosion engine as hereinafter described and claimed. a

The invention is fully disclosed in the following specification of which the accompanying. drawing forms a part, in which the separate parts of my improvemerit'are designated by suitable reference charactersysaid drawing being a sectional plan view of an .tric d fastened to the main'shaft c.

explosion engine or motor constructed according to my invention.

In'the application of my invention as shown in the drawing I provide an auxiliary piston cylinder farranged preferably longitudinally to the-main cylinder aof any form of fuel-pressure fluid or explosion engine.

Asillustrated the main cylinder a is provided with a piston b actuating inthe ushal'manner the crankshaft 'c bymeans of the connecting rod. c The piston is shown as finishing its return stroke and the exploded gases are escaping as usual by means of an exhaust valve (1, which latter is operated by means of an eccenthis style of engines the same is provided with packing rings, means, for lubrication and so forth, allsuch features not forming a part of my invention and not being specifically claimed herein. I

The auxiliary piston chamber f is provided with a 1 spool-ehapedreciprocating piston valve g and contains a centrally located chamber f 2 which is concentric to the central portion of the piston valve 9. Compressed air from a reservoir asshown in" the drawing or direct from an air compressor is admitted by means of a pipe it As is usual withinto the port hoi the piston cylinder f. A spring actuated check valve h is interposed'to-intercept as is usual back pressure from the piston cylinder f into the com pressed air rcservoin, A pipe *5 provided with-a check valve 5- admits oil to the annular chamber f 2 of the piston cylinder f. .As is shown in the drawing in this'instance the oil' is pumped direct-from an oil tank by means of a-smalloil pump i actuated by means or an.

eccentric or cam i placed on" the main shaft 0. Instead of this constructionany other devices such as an oil tank containing oil under pressure may be used for admitting the oil into the annular chamber f The air inlet port i of the piston cylinder f communicates when in the. position as shown in the drawing with communicating ports k which form part of the-piston g, and said ports h? enter'into the annular chamber 1' 2 there by establishing'direct communication between the air compressed reservoir and said annular-chamber f.

A port m is shownwhich forms part of the inain cylinder (1 and serves to establish communication between theipart a of the main cylinder and the piston cylinder f, and the object of this construction is to establish communication between the main cylinder a and a charge of explosive gases contained in the annular c'hamlaer'f whenever the piston g has been placed into the position as shown'by dotted lines in the drawing.

.mental ports h into the annular chamber f. The eccentric c which governs the reciprocatingmotion of the valve piston g is set in such a manner that when communication between the supplemental ports h and the In. the operation of my invention compressed air is I admitted by means of the pipe h, the port h and suppleair inlet port 12 has been cut off by the forward motion of the piston g and just prior to the establishment of intercommunication between the port m and the annular chamber f a charge of oil is admitted and the same ex ploded by means of any of the well known devices, such as by means of the electrical igniter j. The intercommunication ,betweena andj being at this time established, the exploded gases contained in the chamber f will have free access to a? back of the cylinder 6 in order to produce by means of its expansion its actuating force against the main piston 12. .It will thus be seen that the. explosion of the pressure fluid'contained within the annular chamber f actually takes place within the latter instead of directly behind the piston thereby producing a more even expansion and longer duration of time in expanding than if the same 1 would have been exploded within that part of the main engines of similar construction; v

, -As above described the check valves 1' and hf prevent back pressure and back explosion into the oil tank and air reservoir. At the return stroke of the valve piston g the i let port at is cut off again and the portsh are again too - piston cylinder a 'as is usual in many cases of pressure placed-in communication with the air inlet port h for the purpose of restablishing intercommunication between the annular chamber f the compressed air reservoir and "the oil supply for a repetition of the above described method of charging; igniting and exploding the combustible material needed for the operation of such an explosion engine.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:-

In an explosion engine which employs for internal COIllhustion a combined mixture of oil and air the combination of a cylinder having an inlet port therein, a valve casing which communicates with said port, a reciprocating valve piston within said valve casing,-and means of actuating said valve piston, the valve casing being provided with a separate and normally open inlet port for the admission 1 of oil brought thereto under pressure into a chamber formed by a part of said valve casing and surrounding a essyme contracted Liecl: of said valve piston which passes therethrough, the valve casing hoiug furthermore provided with a separate inlet. port for the admission oi? air under pressure, the admission of air to said air inlet port being regulated hy-the reciprocutory moi ion of the valve piston Within the said valve casing: and whereby air can be directed through communicating passages within the valve piston at predetermined intervals from said air inlet port to the atfores'aid .chamher to which oil is admitted, incans x'or' exploding the combined mixture of oil and air within said chamber, and means for establishing communication between said chamber and the cylinder inlet port.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing wit nesses this 28th day of April i905.

JONAS '1. LAGERGREN. Witnesses:

C. .Tv KLEIN, F' A. STEWART. 

